Huntingdon Life Sciences (HLS) is a Contract Research Organisation (CRO) founded in 1951 in Cambridgeshire, England. It has two laboratories in the United Kingdom and one in the United States. With over 1600 staff, it is now the largest non-clinical CRO in Europe. In September 2015, Huntingdon Life Sciences, Harlan Laboratories, GFA, NDA Analytics and LSR associates merged into Envigo. In 2009, HLS was bought outright and is now in private ownership. Prior to this, the latest Annual Report (2008) showed that the company had revenues of $US242.4m and an Operating Profit of 14.8%.